Bluetooth Earbuds, Xunpuls Bluetooth 5.0 Wireless Earbuds TWS Mini Wireless Earphones with Charging Case 20H Play Time Stereo Sound Built-in Mic True Wireless Earbuds for Workout, Running, Sport, Gym

Specification: Bluetooth: Bluetooth v5.0 Transmitting Power: Class2 Working Distance??33ft/10m ?Barrier-free? Input: 4.75V/200mA Battery capacity: 45mAH Charging Case: 650mAH Play time: about 3-4 hours Charge time: about 2-3 hours Standby time: 100 Hours Frequency response: 20 - 22kHz Support profiles: A2DP, HFP, AVRCP, GAVDP, HSP Package Includes Bluetooth Headphones S, M, L Ear Tips USB Charging Cable User Manual Tips for using: Please avoid to use low quality or high current USB charger(Input: 5V/200mAh MAX). Please do not expose the headphones under direct sunlight while charging, especially when environment temperature is high. We recommend unplugging them when not charging. If the unit feels hot at any time during charging, unplug the unit and contact our support team. *Playtime varies according to volume level and audio content.